#north{
	background:pink
}
#logo{
	width:500px;
	height:100%;
	text-align:center;
	padding:30px 0;
	float:left;
}
#logo p{
	margin:auto;
	font-size:20px;
	font-family:'宋体';
	font-weight:bold;
}
#user_msg{
	float:right;	
}
#west{
	width: 10%;
}